The setting to stop it doing that is in the Windows Task Scheduler itself, not in SyncBackSE. In Vista-and-later, it's per-Task, on the Settings tab of the Task ('Run task as soon as possible after....missed'), and is enabled by default. In the old Windows Scheduler (XP, 2003), it's a global setting (affects all Tasks) and it only Notifies you, so I guess you're running Vista or later (hint: always supply your product version number and your Windows version...)
See here for instructions how to open the Windows Task Scheduler, find your Tasks, etc.
Note: you may well be prompted for your Windows password if you edit the Task/s, which you should supply. But if you then get a prompt asking if you want to change the command-string for the Task, click No (or Cancel, whatever). There's a bug that sometimes happens in the new Windows Task Scheduler that tries to split the full command string into two parameters in the wrong place (at the space between 'Program' & 'Files'). If you let it do that, the Task will simply fail.
See here for instructions how to open the Windows Task Scheduler, find your Tasks, etc.
Note: you may well be prompted for your Windows password if you edit the Task/s, which you should supply. But if you then get a prompt asking if you want to change the command-string for the Task, click No (or Cancel, whatever). There's a bug that sometimes happens in the new Windows Task Scheduler that tries to split the full command string into two parameters in the wrong place (at the space between 'Program' & 'Files'). If you let it do that, the Task will simply fail.
